Container stopper



FIG. 1 is a top front isometric view of a container stopper showing theclaimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines are shown for the purpose of illustrating environmentalsubject matter of an exemplary container and form no part of the claimeddesign.

CLAIM The ornamental design for a container stopper, as shown anddescribed herein.